Grate the zucchini and carrot on a fine grater. Boil the 3 eggs, mix the yolks and finely chop the egg whites.
Combine the eggs, zucchini and carrots in a bowl, add the butter, yoghurt and 1 raw egg yolk. Season this with salt and paprika.
Form small patties with wet hands, roll them in flour and fry them in preheated oil.